Method and device for judging type of small-current grounding system containing different-bus double-circuit line
The invention belongs to the field of electric power, and particularly relates to a method and device for judging the type of a small-current grounding system containing a different-bus double-circuit line, and the method comprises the steps: obtaining a zero-sequence voltage and a zero-sequence cur...
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| creator | SHU CHENGZHANG WANG DAOSONG WEI CHUNXIANG HUANG ZHONGLI LU CHAO JIANG LIANDIAN DENG XUERONG TIAN JUNYANG LU GUANGJING LI DONGHAN WEI HAN LI LIJIE WEI SHUJU DONG SHENSONG GONG HUICHANG YANG WANYUAN MO PIAO ZHANG XUN LIANG JIANHUA PAN GUANGMIN SHANG QIONGLING LI HAIYONG CHENG KUN ZHAO FU |
| description | The invention belongs to the field of electric power, and particularly relates to a method and device for judging the type of a small-current grounding system containing a different-bus double-circuit line, and the method comprises the steps: obtaining a zero-sequence voltage and a zero-sequence current, carrying out the out-of-limit starting of the zero-sequence voltage, and judging that the system is an actual grounding system if the amplitude of the bus steady-state zero-sequence voltage is greater than a voltage threshold value; comparing the polarity of the transient zero-sequence current at the outlet position of each line, and selecting a fault characteristic line; calculating the module value of the difference between the amplitude values of the zero-sequence current steady-state components of the adjacent detection points; and selecting a maximum value and a minimum value in the module values, comparing the maximum value and the minimum value with a current threshold value to judge the type of the sy |
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DONG SHENSONG ; GONG HUICHANG ; YANG WANYUAN ; MO PIAO ; ZHANG XUN ; LIANG JIANHUA ; PAN GUANGMIN ; SHANG QIONGLING ; LI HAIYONG ; CHENG KUN ; ZHAO FU</creator><creatorcontrib>SHU CHENGZHANG ; WANG DAOSONG ; WEI CHUNXIANG ; HUANG ZHONGLI ; LU CHAO ; JIANG LIANDIAN ; DENG XUERONG ; TIAN JUNYANG ; LU GUANGJING ; LI DONGHAN ; WEI HAN ; LI LIJIE ; WEI SHUJU ; DONG SHENSONG ; GONG HUICHANG ; YANG WANYUAN ; MO PIAO ; ZHANG XUN ; LIANG JIANHUA ; PAN GUANGMIN ; SHANG QIONGLING ; LI HAIYONG ; CHENG KUN ; ZHAO FU</creatorcontrib><description>The invention belongs to the field of electric power, and particularly relates to a method and device for judging the type of a small-current grounding system containing a different-bus double-circuit line, and the method comprises the steps: obtaining a zero-sequence voltage and a zero-sequence current, carrying out the out-of-limit starting of the zero-sequence voltage, and judging that the system is an actual grounding system if the amplitude of the bus steady-state zero-sequence voltage is greater than a voltage threshold value; 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| subjects | MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING |
| title | Method and device for judging type of small-current grounding system containing different-bus double-circuit line |
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